the contact angle is the angle between the tangent line at the contact point and the horizontal line of the solid surface.

接触角是角之间的切线的联络点和水平线的固体表面。

the concrete expression of the unit tangent line stiffness matrix is given.

讨论了桥梁结构分析中常用单元切线刚度矩阵的具体表达形式。

a derivative at a given point is just the slope of the tangent line that kisses that point.

一个给定点的导数不过就是一条切线的斜率轻吻了那个点。

adopt the sloping cutting craft, cutting along the tangent line of sheet's mid point on z .

在切割工艺上采用倾斜切割的方法，沿分层板造型曲面中点的z向切线进行切割。

to solve the problem about determinant and solution to tangent line of curve of second order in analytic geometry with viewpoint and methods of higher geometry.

利用《高等几何》的观点、方法解决《解析几何》中的二次曲线的切线的存在性与求法问题。

the tangent line principle should be followed in the structure charting of garments, i. e. the places where lines link up in the structure charting should accord with the tangent principle.

服装结构制图应遵循切线原则：结构图中的线与线相连接处应符合切线的原理。

during digitizing, the adaptive sampling planning method based on the curvature of surface and the slope of tangent line of measured point is proposed.

在曲面数字化方面，提出基于曲面曲率和被测点切线斜率的自适应采样规划。

the steady automatic tangent line function has improved working efficiency.

稳定的自动切线功能提高了工作效率。

the procedure used to define the derivative has a geometric interpretation which leads in a natural way to the idea of a tangent line to a curve.

微分的定义步骤有一个几何解释，最简单的观念就是一条曲线的切线。

cut the tangent line pigtail automatically (machinery);

自动（机械）剪切线辫；